Analyze

Studie provides visual representations of lead concentration in Santa Ana cross matching it with vulnerability risk.

“Also of note when interpreting our results is that this study did not take into consideration the ingestion of heavy metals through the dietary route. Had we considered this additional exposure pathway, our calculated chronic daily intake levels of heavy metals would have been greater, resulting in higher estimated risk (particularly for metals such as Pb, As, and Cd which have been widely documented in various foods)” (Marsi et al. 2021)

“Both cancer and non-cancer risk at the Census tract level exhibited positive correlations with indicators of social as well as physiological vulnerability” (Marsi et al. 2021)

Exposure to heavy metals has been associated with adverse health effects and disproportionately impacts communities of a lower socio-economic status.  

This study used a community-based participatory research approach to collect and analyze a large number of randomly sampled soil measurements to yield a high spatially resolved understanding of the distribution of heavy metals in the Santa Ana soil, in an effort to exposure misclassification. This study looks into average metal  concentrations at the Census tract level and by land use type, which helps map potential sources of heavy metals in the soil and better understand the association between socioeconomic status and soil contamination (Marsi et al. 2021). 

In 2018, soil samples of eight heavy metals including lead (Pb), arsenic (As), manganese (Mn), chromium (Cr), nickel (Ni), copper (Cu), cadmium (Cd), and zinc (Zn) were collected across Santa Ana. These were analyzed at a high resolution using XRF analysis. Then, metal concentrations were mapped out and American Community Survey data was used to assess the metals throughout Census tracts in terms of social and economic variables. Risk assessment was conducted to evaluate carcinogenic risk. The results of the concentrations of soil metals were categorized according to land-use type and socioeconomic factors. “Census tracts where the median household income was under $50 000 had 90%, 92.9%, 56.6%, and 54.3% higher Pb, Zn, Cd, and As concentrations compared to high-income counterparts” (Marsi et al. 2021). All Census tracts in Santa were above hazard inder >1, which implies non-carcinogenic effects, and almost all Census tracts showed a cancer risk above 104, which implies greater than acceptable risk. Risk was found to be driven by childhood exposure.

It was concluded that the issue of elevated soil contamination relates back to environmental justice due to overlap between contaminated areas and neighborhoods of lower socioeconomic status. Marsi et al. (2021) found there needs to be more community-driven recommendations for policies and other actions to address disproportionate solid contamination and prevent adverse health outcomes.      

Published in May 2021, amid the coronavirus pandemic where in-person community workshops and meetings turned into weekly virtual meetings. 

-> Authors:

Shahir Masri: Department of Environmental and Occupational Health, Program in Public Health, University of California, Irvine; air pollution scientist.

Alana M. W. LeBrón: Department of Health, Society, and Behavior, University of California, Irvine; Assistant Professor, Chicano/Latino Studies; Interests: structural racism and health, health of Latina/o communities, community-based participatory research.

Michael D. Logue: Department of Chicano/Latino Studies, University of California, Irvine

Enrique Valencia: Orange County Environmental Justice, Santa Ana

Abel Ruiz: Jóvenes Cultivando Cambios, Santa Ana; CRECE Urban Farming Cooperative member

Abigail Reyes: Community Resilience, University of California, Irvine

Jun Wu: Department of Environmental and Occupational Health, Program in Public Health, University of California, Irvine

Emily Goldmann is a PhD and MPH (Master of Public Health) at the College of Global Public Health. She focuses on environmental and social causes of mental health and their consequences. While she doesn't focus on disasters, her studies intersect with those in which we are interested in: Global Health and causes of mental health disorders.

Sandro Galea is a physician and epidemiologist at Boston School of Public Health. He has a long list of other positions of research at other colleges as well. He focuses on how the social aspects of a community create mental disorders, particularly urban communities where mood-anxiety and substance abuse disorders are common. He has a particular focus also upon mass-trauma and disasters and how they affect the mental health of the world long term, such as 9-11 and Hurricane Katrina. He studies precisely what is relevant to the DSTS Network in these cases, where he looks at the mental health consequences instead of the physical consequences of these disasters.

The understanding of disasters and their relation to global mental health, both to those who suffered directly from then and to those who were part of the greater community of those who suffered, is constantly evolving. Analyzation of past research and the current methods of study allow the global community to effectively understand and treat mental health on a large scale.

"At this point, the burden of mental disorders after disasters has been well documented, and interest in the course of trajectory of psychological symptoms following disasters is growing."

"Persons who live in a community where a disaster hsa occured may differ in their degree of exposure in the event. They may be affected directly, being present at the disaster site, or indirectly, having loved ones present at the disaster site or seeing images of the disaster in the media."

"Ongoing stressors such as job loss, property damage, marital stress, physical health conditions related to the disaster, and displacement are often experienced by those affected by the disaster... Low levels of and reductions in social support are also associated iwth post-disaster psychological symptoms."

The authors reference main research articles and books written about the subject from the past. 

They also reference epidemiological and sociological studies in supporting their mental health arguements. 

Other health references, such as the DSM and Indexes are referenced in the article. 

The authors used their knowledge of the subject and an extensive amount of articles and publications they referenced in order to create a summary of the subject and where it is moving toward.